Question

1. what was the result of the u.s. victory in the battle of okinawa?

the united states opened a second front to relieve attacks on china.
the united states was able to mount an invasion of the japanese mainland.
the japanese navy advanced toward hawaii.

Explanation:

The Battle of Okinawa (1945) gave the U.S. a close, strategic base near Japan's mainland, enabling the potential for a full-scale invasion (though the atomic bombings ultimately made this unnecessary). The other options are incorrect: the U.S. did not open a second front for China via Okinawa, and the Japanese navy was severely weakened, not advancing toward Hawaii.

Answer:

The United States was able to mount an invasion of the Japanese mainland.